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https://github.com/torvalds/linux
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aa423ac422
Move the irqdomain specific code into its own file. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Tested-by: Juergen Gross <jgross@suse.com> Reviewed-by: Jason Gunthorpe <jgg@nvidia.com> Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Acked-by: Bjorn Helgaas <bhelgaas@google.com> Link: https://lore.kernel.org/r/20211206210224.817754783@linutronix.de
40 lines
1.2 KiB
C
40 lines
1.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#include <linux/pci.h>
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#include <linux/msi.h>
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#define msix_table_size(flags) ((flags & PCI_MSIX_FLAGS_QSIZE) + 1)
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extern int pci_msi_setup_msi_irqs(struct pci_dev *dev, int nvec, int type);
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extern void pci_msi_teardown_msi_irqs(struct pci_dev *dev);
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#ifdef CONFIG_PCI_MSI_ARCH_FALLBACKS
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extern int pci_msi_legacy_setup_msi_irqs(struct pci_dev *dev, int nvec, int type);
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extern void pci_msi_legacy_teardown_msi_irqs(struct pci_dev *dev);
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#else
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static inline int pci_msi_legacy_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
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{
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WARN_ON_ONCE(1);
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return -ENODEV;
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}
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static inline void pci_msi_legacy_teardown_msi_irqs(struct pci_dev *dev)
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{
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WARN_ON_ONCE(1);
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}
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#endif
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/*
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* PCI 2.3 does not specify mask bits for each MSI interrupt. Attempting to
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* mask all MSI interrupts by clearing the MSI enable bit does not work
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* reliably as devices without an INTx disable bit will then generate a
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* level IRQ which will never be cleared.
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*/
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static inline __attribute_const__ u32 msi_multi_mask(struct msi_desc *desc)
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{
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/* Don't shift by >= width of type */
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if (desc->pci.msi_attrib.multi_cap >= 5)
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return 0xffffffff;
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return (1 << (1 << desc->pci.msi_attrib.multi_cap)) - 1;
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}
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